Freightliner Airbag replaced. Now not level
I had a front airbag go bad. Started leaking and would not air up. Replaced (very easy) and now that side is 1.5 inches lower. There is only one leveling valve on front. Do I sim or replace other side...
Forum Discussion
fairway2002 wrote:carringb wrote:
Yup. Diameters don't match. Either replace the other side, or switch to a 2-channel valve setup, so each side will be leveled independent. Independent control will reduce body roll as well, since air won't transfer when weight transfers in turns.
This is interesting. Explain a little more. If I have 100lbs (this is just a value for conversation) in each bag with a single valve. How does a 100lbs in each bag with two valves help role? I trouble shoot electronics so I see things different
Thanks
When you have a single valve, both bags maintain 100 psi all the time, however the volume changes. Say you are taking a right-hand curve.... The weight transfer of the motorhome will apply more load to the left side bag. Since it still has 100 psi overall, if will compress the same amount that the opposite airbags extends.
With independent airbags controls, the left airbag won't compress as much, because the air pressure in the airbag will go up proportionally to the added load, making it behave like a progressive spring. Fast acting valves can even add and release air continuously, further helping the coach maintain a level ride around corners.
The downside to independent controls, is the same increase in roll stiffness, will also creating a stiffer ride over surfaces with lateral unevenness, such as a diagonal speed bump, or turning into a sharp driveway. But if the rear suspension already has high roll stiffness, then you may not ever notice. Also, if the coach cannot resist torsional forces well, the added front roll stiffness may cause the coach to twist more.
